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以“济徐23”甘薯为试验材料,设置空白对照、腐植酸复混肥、等量无机养分、活化风化煤(等量腐植酸)4个处理,通过大田试验,研究腐植酸复混肥对甘薯产量、产量构成因素及钾肥利用率的影响。结果表明,施用腐植酸复混肥可促进块根膨大,甘薯产量高达50.39 t/hm2,与空白对照相比,增产26.07%;施用腐植酸复混肥显著提高了钾素产块根效率、钾素收获指数、钾肥农学利用率和钾肥偏生产力,降低了生育期甘薯T/R比值(茎叶鲜重与块根鲜重的比值)。
The treatment of humic acid mixed with humic acid was carried out by field experiments with four treatments of “Jiuxue 23” sweet potato as test material, blank control, humic acid compound fertilizer, equivalent inorganic nutrient and activated weathered coal (equivalent humic acid) Effect of Fertilizer on Sweet Potato Yield, Yield Components and Potassium Utilization. The results showed that the application of humic acid compound fertilizer can promote root tuber enlargement, sweet potato yield up to 50.39 t / hm2, compared with the blank control, an increase of 26.07%; application of humic acid compound fertilizer significantly increased potassium yield root efficiency, potassium harvest Index, agronomic utilization rate of potash fertilizer and partial yield of potash fertilizer, which reduced the ratio of T / R of sweet potato (ratio of fresh weight of stem to fresh weight of root tuber) in growth period.